Phosgene → 4-(3-Cyclobutyl-2,3,4,5-tetrahydro-1h-benzo[d]azepin-7-yloxy)-piperidine-1-carboxylic acid diethylamide

3-Cyclobutyl-7-(piperidin-4-yloxy)-2,3,4,5-tetrahydro-1H-benzo[d]azepine (E6) (1.5 g, 5 mmol) dissolved in toluene (40 ml) was added slowly to a 20% phosgene in toluene solution (12.5 ml, 25 mmol) at 0° C. The mixture was stirred at room temperature for 3 hours and concentrated in vacuo to afford a crude residue (1.91 g). The crude product (300 mg, 0.75 mmol) was then added to a stirred slurry of diethylamine (207 μL, 2 mmol) and diethylaminomethyl polystyrene (3.2 mmol/g, 1.41 g, 4.5 mmol) in dichloromethane (10 ml). The reaction mixture was stirred at room temperature for 16 hours, filtered and concentrated in vacuo. The crude residue was purified by column chromatography eluting with dichloromethane then a mixture of 0.880 ammonia:ethanol:dichloromethane (1:9:90) to afford the title product (E61). MS (ES+) m/e 400 [M+H]+.

1. concentrationconcentrated in vacuo
2. customto afford a crude residue (1.91 g)
3. stirringThe reaction mixture was stirred at room temperature for 16 hours
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe crude residue was purified by column chromatography
7. washeluting with dichloromethane
8. additiona mixture of 0.880 ammonia:ethanol:dichloromethane (1:9:90)

ORD record

ord-d0158d05d1f24e1aa626d7d73e6e9850

Source dataset

uspto-grants-2010_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07704994B2